^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Copyright (C) 2019 Facebook */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #ifndef _GNU_SOURCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #define _GNU_SOURCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <bpf/bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <bpf/libbpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <sys/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <bpf/btf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "json_writer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "main.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define MAX_OBJ_NAME_LEN 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static void sanitize_identifier(char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) for (i = 0; name[i]; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (!isalnum(name[i]) && name[i] != '_')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) name[i] = '_';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static bool str_has_suffix(const char *str, const char *suffix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) size_t i, n1 = strlen(str), n2 = strlen(suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (n1 < n2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) for (i = 0; i < n2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (str[n1 - i - 1] != suffix[n2 - i - 1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void get_obj_name(char *name, const char *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /* Using basename() GNU version which doesn't modify arg. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) strncpy(name, basename(file), MAX_OBJ_NAME_LEN - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) name[MAX_OBJ_NAME_LEN - 1] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (str_has_suffix(name, ".o"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) name[strlen(name) - 2] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) sanitize_identifier(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static void get_header_guard(char *guard, const char *obj_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) sprintf(guard, "__%s_SKEL_H__", obj_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) for (i = 0; guard[i]; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) guard[i] = toupper(guard[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static const char *get_map_ident(const struct bpf_map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) const char *name = bpf_map__name(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (!bpf_map__is_internal(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (str_has_suffix(name, ".data"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return "data";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) else if (str_has_suffix(name, ".rodata"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return "rodata";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) else if (str_has_suffix(name, ".bss"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return "bss";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) else if (str_has_suffix(name, ".kconfig"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return "kconfig";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static void codegen_btf_dump_printf(void *ctx, const char *fmt, va_list args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) vprintf(fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int codegen_datasec_def(struct bpf_object *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct btf *btf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct btf_dump *d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) const struct btf_type *sec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) const char *obj_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) const char *sec_name = btf__name_by_offset(btf, sec->name_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) const struct btf_var_secinfo *sec_var = btf_var_secinfos(sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) int i, err, off = 0, pad_cnt = 0, vlen = btf_vlen(sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) const char *sec_ident;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) char var_ident[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) bool strip_mods = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (strcmp(sec_name, ".data") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) sec_ident = "data";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) } else if (strcmp(sec_name, ".bss") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) sec_ident = "bss";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) } else if (strcmp(sec_name, ".rodata") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) sec_ident = "rodata";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) strip_mods = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) } else if (strcmp(sec_name, ".kconfig") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) sec_ident = "kconfig";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) printf(" struct %s__%s {\n", obj_name, sec_ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) for (i = 0; i < vlen; i++, sec_var++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) const struct btf_type *var = btf__type_by_id(btf, sec_var->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) const char *var_name = btf__name_by_offset(btf, var->name_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) DECLARE_LIBBPF_OPTS(btf_dump_emit_type_decl_opts, opts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .field_name = var_ident,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .indent_level = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .strip_mods = strip_mods,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int need_off = sec_var->offset, align_off, align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) __u32 var_type_id = var->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (off > need_off) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) p_err("Something is wrong for %s's variable #%d: need offset %d, already at %d.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) sec_name, i, need_off, off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) align = btf__align_of(btf, var->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (align <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) p_err("Failed to determine alignment of variable '%s': %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) var_name, align);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Assume 32-bit architectures when generating data section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * struct memory layout. Given bpftool can't know which target
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * host architecture it's emitting skeleton for, we need to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * conservative and assume 32-bit one to ensure enough padding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * bytes are generated for pointer and long types. This will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * still work correctly for 64-bit architectures, because in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * the worst case we'll generate unnecessary padding field,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * which on 64-bit architectures is not strictly necessary and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * would be handled by natural 8-byte alignment. But it still
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * will be a correct memory layout, based on recorded offsets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * in BTF.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (align > 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) align = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) align_off = (off + align - 1) / align * align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (align_off != need_off) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) printf("\t\tchar __pad%d[%d];\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) pad_cnt, need_off - off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) pad_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* sanitize variable name, e.g., for static vars inside
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * a function, it's name is '<function name>.<variable name>',
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * which we'll turn into a '<function name>_<variable name>'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) var_ident[0] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) strncat(var_ident, var_name, sizeof(var_ident) - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) sanitize_identifier(var_ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) printf("\t\t");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) err = btf_dump__emit_type_decl(d, var_type_id, &opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) printf(";\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) off = sec_var->offset + sec_var->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) printf(" } *%s;\n", sec_ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int codegen_datasecs(struct bpf_object *obj, const char *obj_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct btf *btf = bpf_object__btf(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int n = btf__get_nr_types(btf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct btf_dump *d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) int i, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) d = btf_dump__new(btf, NULL, NULL, codegen_btf_dump_printf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (IS_ERR(d))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return PTR_ERR(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) for (i = 1; i <= n; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) const struct btf_type *t = btf__type_by_id(btf, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (!btf_is_datasec(t))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) err = codegen_datasec_def(obj, btf, d, t, obj_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) btf_dump__free(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static void codegen(const char *template, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) const char *src, *end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) int skip_tabs = 0, n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) char *s, *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) va_list args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) n = strlen(template);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) s = malloc(n + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) exit(-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) src = template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) dst = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* find out "baseline" indentation to skip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) while ((c = *src++)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (c == '\t') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) skip_tabs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) } else if (c == '\n') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) p_err("unrecognized character at pos %td in template '%s'",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) src - template - 1, template);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) free(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) exit(-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) while (*src) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* skip baseline indentation tabs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) for (n = skip_tabs; n > 0; n--, src++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (*src != '\t') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) p_err("not enough tabs at pos %td in template '%s'",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) src - template - 1, template);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) free(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) exit(-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /* trim trailing whitespace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) end = strchrnul(src, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) for (n = end - src; n > 0 && isspace(src[n - 1]); n--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) memcpy(dst, src, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) dst += n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (*end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) *dst++ = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) src = *end ? end + 1 : end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) *dst++ = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /* print out using adjusted template */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) va_start(args, template);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) n = vprintf(s, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) free(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int do_skeleton(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) char header_guard[MAX_OBJ_NAME_LEN + sizeof("__SKEL_H__")];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) size_t i, map_cnt = 0, prog_cnt = 0, file_sz, mmap_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) char obj_name[MAX_OBJ_NAME_LEN], *obj_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct bpf_object *obj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) const char *file, *ident;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct bpf_program *prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int fd, len, err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct bpf_map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) struct btf *btf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (!REQ_ARGS(1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) usage();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) file = GET_ARG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (argc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) p_err("extra unknown arguments");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (stat(file, &st)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) p_err("failed to stat() %s: %s", file, strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) file_sz = st.st_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) mmap_sz = roundup(file_sz, sysconf(_SC_PAGE_SIZE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) fd = open(file, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) p_err("failed to open() %s: %s", file, strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) obj_data = mmap(NULL, mmap_sz, PROT_READ, MAP_PRIVATE, fd, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (obj_data == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) obj_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) p_err("failed to mmap() %s: %s", file, strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) get_obj_name(obj_name, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) opts.object_name = obj_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) obj = bpf_object__open_mem(obj_data, file_sz, &opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (IS_ERR(obj)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) char err_buf[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) libbpf_strerror(PTR_ERR(obj), err_buf, sizeof(err_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) p_err("failed to open BPF object file: %s", err_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) obj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) bpf_object__for_each_map(map, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) ident = get_map_ident(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (!ident) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) p_err("ignoring unrecognized internal map '%s'...",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) bpf_map__name(map));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) map_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) bpf_object__for_each_program(prog, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) prog_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) get_header_guard(header_guard, obj_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) /* THIS FILE IS AUTOGENERATED! */ \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) #ifndef %2$s \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) #define %2$s \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) #include <stdlib.h> \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) #include <bpf/libbpf.h> \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct %1$s { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) struct bpf_object_skeleton *skeleton; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct bpf_object *obj; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) obj_name, header_guard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (map_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) printf("\tstruct {\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) bpf_object__for_each_map(map, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ident = get_map_ident(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (!ident)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) printf("\t\tstruct bpf_map *%s;\n", ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) printf("\t} maps;\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (prog_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) printf("\tstruct {\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) bpf_object__for_each_program(prog, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) printf("\t\tstruct bpf_program *%s;\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) bpf_program__name(prog));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) printf("\t} progs;\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) printf("\tstruct {\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) bpf_object__for_each_program(prog, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) printf("\t\tstruct bpf_link *%s;\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) bpf_program__name(prog));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) printf("\t} links;\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) btf = bpf_object__btf(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (btf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) err = codegen_datasecs(obj, obj_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) static void \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) %1$s__destroy(struct %1$s *obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (!obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (obj->skeleton) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) bpf_object__destroy_skeleton(obj->skeleton);\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) free(obj); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static inline int \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) %1$s__create_skeleton(struct %1$s *obj); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static inline struct %1$s * \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) %1$s__open_opts(const struct bpf_object_open_opts *opts) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct %1$s *obj; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) obj = (struct %1$s *)calloc(1, sizeof(*obj)); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (!obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) return NULL; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (%1$s__create_skeleton(obj)) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) goto err; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (bpf_object__open_skeleton(obj->skeleton, opts)) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) goto err; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return obj; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) err: \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) %1$s__destroy(obj); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return NULL; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static inline struct %1$s * \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) %1$s__open(void) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return %1$s__open_opts(NULL); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static inline int \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) %1$s__load(struct %1$s *obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return bpf_object__load_skeleton(obj->skeleton); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) static inline struct %1$s * \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) %1$s__open_and_load(void) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) struct %1$s *obj; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) obj = %1$s__open(); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (!obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return NULL; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (%1$s__load(obj)) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) %1$s__destroy(obj); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return NULL; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) return obj; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) static inline int \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) %1$s__attach(struct %1$s *obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return bpf_object__attach_skeleton(obj->skeleton); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static inline void \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) %1$s__detach(struct %1$s *obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) return bpf_object__detach_skeleton(obj->skeleton); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) obj_name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static inline int \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) %1$s__create_skeleton(struct %1$s *obj) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) { \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) struct bpf_object_skeleton *s; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) if (!s) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return -1; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) obj->skeleton = s; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) s->sz = sizeof(*s); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) s->name = \"%1$s\"; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) s->obj = &obj->obj; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) obj_name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (map_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* maps */ \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) s->map_cnt = %zu; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) s->map_skel_sz = sizeof(*s->maps); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (!s->maps) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto err; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) map_cnt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) bpf_object__for_each_map(map, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) ident = get_map_ident(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (!ident)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) s->maps[%zu].name = \"%s\"; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) s->maps[%zu].map = &obj->maps.%s; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) i, bpf_map__name(map), i, ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) /* memory-mapped internal maps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (bpf_map__is_internal(map) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) (bpf_map__def(map)->map_flags & BPF_F_MMAPABLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) printf("\ts->maps[%zu].mmaped = (void **)&obj->%s;\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) i, ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (prog_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) /* programs */ \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) s->prog_cnt = %zu; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) s->prog_skel_sz = sizeof(*s->progs); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (!s->progs) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) goto err; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) prog_cnt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) bpf_object__for_each_program(prog, obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) s->progs[%1$zu].name = \"%2$s\"; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) s->progs[%1$zu].prog = &obj->progs.%2$s;\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) s->progs[%1$zu].link = &obj->links.%2$s;\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) i, bpf_program__name(prog));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) s->data_sz = %d; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) s->data = (void *)\"\\ \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) file_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) /* embed contents of BPF object file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) for (i = 0, len = 0; i < file_sz; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) int w = obj_data[i] ? 4 : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) len += w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (len > 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) printf("\\\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) len = w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (!obj_data[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) printf("\\0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) printf("\\x%02x", (unsigned char)obj_data[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) codegen("\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) \"; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return 0; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) err: \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) bpf_object__destroy_skeleton(s); \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) return -1; \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) } \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) #endif /* %s */ \n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) header_guard);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) bpf_object__close(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (obj_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) munmap(obj_data, mmap_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) static int do_help(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (json_output) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) jsonw_null(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) "Usage: %1$s %2$s skeleton FILE\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) " %1$s %2$s help\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) " " HELP_SPEC_OPTIONS "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) bin_name, "gen");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) static const struct cmd cmds[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) { "skeleton", do_skeleton },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) { "help", do_help },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) { 0 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) int do_gen(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return cmd_select(cmds, argc, argv, do_help);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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